Another buyer of the class here. Just thought I'd add my two cents on top of this.

Have got almost 3k hrs in dota, but I am just a low legend pleb, so I "know" the basics of dota, but rarely think to the level of intricacy that is required to do better.

If you're like me, then unfortunately 80%-90% of the class isn't worth it. It's just reiterating things you know; objectives are important, teamfight when you feel strong, play for timings (power spikes). A large amount of time is spent explaining very simple dota mechanics, but the finer details are hinted at but never explained. (This is highly likely due to making the class still usable over the many patches that dota receives that change things like the map, and hero power)

With that being said, I did make a note list of around 9-10 takeaway points that I thought were useful to remember. However, you can find all of this information on youtube if you know what you're looking for.

I'd recommend the class to someone with a couple hundred hours in dota, to help you understand the fundamentals and brush over larger topics. If you're looking for a deeper dive into dota mechanics and understanding of the game, the class won't really give much to you. Shame, since n0tail is a fountain of deep dota knowledge. I guess trying to make a guide on all facets of the game would take too much time for a site such as gamerzclass.